I find a bandanna to be incredibly versatile, and that is why one rides in my left rear pocket almost always. Situations vary..... I did have a whistle on my key ring, but took it off, putting it on a lanyard in my briefcase. It will be on body if deep in the woods. I also like to e close to some sort of fire making apparatus - my current favorite is a split pea lighter - it stands up to key ring carry quite well. And there is still room on my key ring for .....Keys!